A5069408771- Geology and Paleoclimatology Research
- Semiconductor Quantum Structures and Devices
- Advanced Memory and Neural Computing
- Medieval Literature and History
- Geochemistry and Elemental Analysis
- Metallurgical Processes and Thermodynamics
- Semiconductor materials and devices
- Methane Hydrates and Related Phenomena
- Marine and environmental studies
- Isotope Analysis in Ecology
- Marine and coastal ecosystems
- Grouting, Rheology, and Soil Mechanics
- Power Quality and Harmonics
- Cryospheric studies and observations
- ZnO doping and properties
- Photonic and Optical Devices
- Radiation Effects in Electronics
- Paleontology and Stratigraphy of Fossils
- Advancements in Semiconductor Devices and Circuit Design
- Magnesium Oxide Properties and Applications
- Semiconductor Lasers and Optical Devices
- Superconducting and THz Device Technology
- Quantum-Dot Cellular Automata
- Neural Networks and Reservoir Computing
- Eurasian Exchange Networks
University of Tasmania
2022-2023
University of Cambridge
2019-2022
University of Florida
1994-2022
British Antarctic Survey
2014-2022
University of Iowa
2016-2022
University of Idaho
2006-2018
British Museum
2018
University College London
2015
UCL Australia
2015
Institute of Archaeology
2013
Recent experiments have shown that exogenous bacteria can be introduced into soil for the purpose of inducing calcite precipitation. A series tests are documented in this paper demonstrate natural indigenous also stimulated to induce precipitation with measurable changes geotechnical properties. Tests reported include a microcosm experiment cone-penetration testing and cyclic triaxial shear tests. These significant quantities precipitation, result properties, resistance ratio increased...
The Antarctic Peninsula's Pacific margin is one of the best studied sectors continental margin. Since 1990s, several research cruises have targeted rise with geophysical surveys, conventional coring and deep-sea drilling. previous studies highlighted potential large sediment drifts on as high-resolution palaeoenvironmental archives. However, these also suffered from chronological difficulties arising lack calcareous microfossils, initial results geomagnetic relative palaeointensity (RPI)...
An ion induced charge collection study, using an array of GaAs enhancement-mode MESFET geometries, has identified two primary excess effects, a fringe field effect and gated channel effect. The introduction buried p-layer was found to suppress the effect, which resulted in reduction maximum collected. LET threshold for SEU similar both processes. For devices used this results suggest that is primarily responsible low threshold.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Neodymium (Nd) isotopes have been utilized as a tracer of water mass source in the modern ocean and palaeoceanographic studies, though oceanic cycling Nd is not yet fully constrained. Recent studies highlighted importance processes that occur near seawater – sediment interface altering isotopic composition bottom waters. The two major observed "boundary exchange" "benthic flux" suggested playing an important role setting compositions, however, more are needed to constrain their chemical...
An emerging material for flexible UV applications is<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mtext>Mg</mml:mtext><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mtext>Zn</mml:mtext><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>O which is capable of tunable bandgap and luminescence in the range ~3.4 eV–7.4 eV depending on composition x . Studies optical characteristics ZnO Mg 0.3 Zn 0.7 O nanocrystalline films are...
MgZnO is emerging as a vital semiconductor-alloy system with desirable optical properties that can span large range of the UV spectrum. Due to its benign chemical character, considered be an environmentally friendly material. This paper presents studies on annealing useful and straightforward approach for enhancement crystal quality Mg0.17Zn0.83O nanocrystalline films grown via DC sputtering. The alloys were studied several imaging techniques. It was found high-temperature annealing, ~900...
Abstract Most conceptual models of ocean circulation during past glacial periods invoke a shallowed North Atlantic‐sourced water mass overlying an expanded, poorly ventilated Southern Ocean (SO)‐sourced deep (Southern Component Water or SCW), rich in remineralized carbon, within the Atlantic basin. However, ventilation state, carbon inventory, and pathway SCW sourced Pacific sector SO (Pacific SO) are less well understood. Here we present multiproxy data—including δ 18 O 13 C measured on...
Iron/iron-oxide (Fe–Fe3O4) core–shell nanoclusters (NCs) synthesized by a cluster deposition technique were subjected to study of their high temperature structural and morphological behavior. Annealing effects have been investigated up 800 °C in vacuum, oxygen argon environments. The ~18 nm average size the as-prepared NCs increases slowly temperatures 500 all three abruptly environment but vacuum when annealed at °C. x-ray diffraction (XRD) studies shown that iron core remains only they...
This paper focuses on an act that can be seen to typify what heritage organizations might confidently describe as a ‘crime against culture’: the deliberate destruction by fire of twelfth-century wooden stave church at Fantoft in Norway 1992. uses case study challenge ways which (in this Norway’s Directorate Cultural Heritage) establish and protect mono-cultural narratives push interpretative agendas predicated uncritical concept universal ‘value’ its equation with material authenticity. It...
The ion-induced gate edge effect and excess charge collection present in GaAs MESFETs are not InP HFETs. An SEU (single event upset) characterization study shows that these devices can provide an rate which is lower than of unhardened CMOS.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A report is presented on a fully integrated metal-semiconductor-metal (MSM) transimpedance amplifier photoreceiver based lattice matched In/sub 0.53/Ga/sub 0.47/As-In/sub 0.52/Al/sub 0.48/As heterostructures grown by molecular beam epitaxy (MBE). The layers were deposited in single growth run with the heterojunction-FET (HFET) overlaying detector structures and fabricated using simple, near planar process that does not require pregrowth substrate patterning or complex planarization schemes....
This paper outlines the state of research into early medieval conflict landscapes in England and sets out a theoretical methodological basis for sustained systematic investigation battlefield toponymy topography. The hypothesis is advanced that certain types place were considered particularly appropriate performance violent throughout period social ideas determined choice locale are, to some degree, recoverable through in‐depth, interdisciplinary analysis landscapes, names texts. events 1006...
High speed results on In0.53, Ga0.47As/ln0.52Al0.aAs (on InP) planar doped heterojunction-FETs and 1.3–1.6μ wavelength-compatible metal-semiconductor-metal photodetector devices fabricated from a vertically stacked device design with the FET overlaying detector structure are reported. A cut-off frequency for unity current gain of 30GHz was achieved 1μ gatelength. The at 7 V bias had photoresponse dark 0.48 A/W 24 nA, respectively. At 10 FWHM impulse response 65 ps. simple near-planar...
A subharmonic parametric oscillator, which uses the diffusion capacitance of a charge-storage diode, is described. The output such circuit may exist in one two stable states, are separated from another phase by πrad. Because nonlinear nature circuit, it possible to change state within cycle voltage. amplitude applied switching pulse determined analytically terms parameters, and analysis confirmed experimentally.It would appear that this device could be made operate as logic element having...